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Fresh peach season provides a fuzzy-skinned, sweet and juicy invitation to enjoy the nutritional goodness of these favorite fruits. Peaches are low in calories and glycemic index, a good source of vitamins, phytonutrients and fiber, and may even help fight cancer.

If youre over 65 or approaching that age and still watching your weight, new findings suggest you may be worrying about the wrong thing. Its true that the obesity epidemic has exacted a serious toll on Americas health. But for older adults, maintaining muscle mass to ward off frailty-a condition called sarcopenia-is more important both to the length and quality of life than counting pounds. The popular Body Mass Index (BMI-see box), a calculation that combines weight and height, turns out not to be a very good predictor of health for older adults-for whom the rules about overweight may simply be different than for younger people.

Tomatoes are so ubiquitous in the American diet, from the fresh tomatoes just now coming into prime season to countless processed products, that its hard to believe they were once commonly avoided as poisonous. Its true that tomatoes, like potatoes and peppers, belong to the nightshade family, and their leaves contain alkaloids that can indeed be toxic to pets. Europeans who saw the plants from the New World thought tomatoes resembled belladonna-deadly nightshade-and gave the fruit the forbidding name wolf peach.

Celery, and several other common vegetables (for example, beets, arugula lettuce) naturally contain high levels of sodium nitrate. Processed meats usually have sodium nitrate added to them to help cure the meat, and there is a theory going back some decades that it is the sodium nitrate in processed meats that conveys an increased risk of cancer (this concept remains a theory, and has never been proven).

If youve been trying to follow the advice to eat five servings of fruits and vegetables a day, two new studies might inspire you to try harder-and to aim for even more daily produce. Both studies found even greater benefits from consuming more than five daily servings of fruits and vegetables.

If these thirsty, sweaty summer days have you worrying whether youre getting eight glasses of water a day-as conventional wisdom says you should-you need to take a closer look at the facts versus the fictions about hydration.

Participants in a recently announced nationwide study wont get to eat chocolate candy in the name of science, but they will be testing the cocoa flavanols thought to give dark chocolate heart-healthy properties. The four-year study will give participants either a placebo or flavorless capsules containing doses of cocoa flavanols higher than could be easily obtained by eating chocolate. It will be by far the largest trial of the chocolate compounds, which previous findings have…

Among the many pleasures of summer is the return of fresh, wild-caught salmon to local supermarkets. In general, wild salmon are in season from May through September, depending on species. Richly flavored and easy to prepare in a variety of ways (see recipe on the next page), its no wonder salmon is Americas third most-consumed seafood, behind only shrimp and tuna, at about two pounds per person annually.

If youre taking extra vitamin D or calcium to protect your bones, theres good news about these bone-building nutrients and your cholesterol levels. According to a new analysis of data from the Womens Health Initiative (WHI), supplements of vitamin D and calcium might modestly improve your cholesterol numbers. Previous studies of calcium and cholesterol had produced inconsistent results, while little was known about vitamin Ds effects.

If you listen to advocates of the raw food movement, everything is better for you when its not cooked. But theres a whole group of leafy-green vegetables traditionally served cooked-mustard, collard and turnip greens-that, except in the South, most Americans simply skip as they concentrate on fresh salad greens. Cooking helps tame the flavors of some greens, like mustard, that might deter some diners. Cooking can also make chard more palatable, when its leaves and stems are too mature for salads. And of course cooking opens up a whole different menu for spinach and kale.